Pr-doped inorganic compound, luminescent composition and luminescent body containing the same, and light emitting device

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EP 1 798 271 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.08.2007 Bulletin 2007/32

(43)	Date of publication A2:
	20.06.2007 Bulletin 2007/25

(21)	Application number: 06025973.6

(22)	Date of filing: 14.12.2006

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International Patent Classification (IPC):

C09K 11/77^(2006.01)
C09K 11/81^(2006.01)

C09K 11/80^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

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Priority:

15.12.2005 JP 2005361337
06.02.2006 JP 2006028033

(71)	Applicant: Fujifilm Corporation
	Minato-ku Tokyo (JP)

(72)	Inventors:
	Ikada, Tomotake c/o FUJIFILM Corporation Ashigarakami-gun, Kanagawa-ken (JP) Suzuki, Masayuki c/o FUJIFILM Corporation Ashigarakami-gun, Kanagawa-ken (JP) Takata, Masahiro c/o FUJIFILM Corporation Ashigarakami-gun, Kanagawa-ken (JP)

(74)	Representative: Klunker . Schmitt-Nilson . Hirsch
	Winzererstrasse 106 80797 München 80797 München (DE)

(54)	Pr-doped inorganic compound, luminescent composition and luminescent body containing the same, and light emitting device

(57) A Pr-doped inorganic compound contains a solid solution having been formed by substitution of at least a part of at least one kind of substitutable ions, which are contained at a substitutable ion site in a matrix oxide, by Pr. The Pr-doped inorganic compound satisfies the condition represented by the formula:

wherein r1 represents the mean ionic radius of ionic radiuses of all of elements, including Pr, which elements constitute the substitutable ion site having been doped with Pr, and r2 represents the ionic radius of Pr.

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